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Endocrine glands
Endocrine glands


Male reproductive anatomy
Male reproductive anatomy


Definition:

Testicular failure is the inability of the testicles to produce sperm or male hormones.

See also:



Alternative Names:

Primary hypogonadism - male



Causes, incidence, and risk factors:

Testicular failure is uncommon. Causes include:

  • Certain drugs, including glucocorticoids, ketoconazole, and opioids
  • Chromosome problems
  • Diseases that affect the testicle, including mumps , orchitis, and testicular cancer
  • Injury to the testicles
  • Testicular torsion

The following things increase the risk for testicular failure:



Symptoms:
  • Decrease in height
  • Enlarged breasts (gynecomastia)
  • Infertility
  • Lack of muscle mass
  • Lack of sex drive (libido)
  • Loss of armpit and pubic hair
  • Slow development or absence of secondary male sex characteristics (growth and distribution of hair, scrotal enlargement, penis enlargement, voice changes)

Men may also notice they do not need to shave as frequently.



Signs and tests:

A physical examination may reveal:

  • Genitals that do not clearly look either male or female (usually noted in infancy)
  • Abnormally small testicle
  • Tumor or mass (group of cells) on or near the testicle

Further testing may show decreased bone mineral density and fractures. Blood tests may reveal low levels of testosterone and high levels of prolactin, FSH , and LH .

Testicular failure and low testosterone levels may be difficult to diagnose in older men because testosterone levels normally fall with age. The level of testosterone at which replacement therapy would be likely to improve symptoms and other outcomes is unpredictable and variable.



Treatment:

Male hormone supplements may successfully treat some forms of testicular failure. Men who take testosterone replacement therapy need to be carefully monitored by a doctor. Testosterone may cause overgrowth of the prostate gland and an abnormal increase in red blood cells.

Avoiding a specific drug or activity known to cause the problem may result in return of normal testicular function.



Support Groups:



Expectations (prognosis):

Many forms of testicular failure cannot be reversed. Hormone replacement therapy can help reverse symptoms, although it may not restore fertility.



Complications:

Testicular failure before the onset of puberty will stop normal body growth, specifically the development of adult male characteristics.



Calling your health care provider:

Call for an appointment with your health care provider if you have symptoms of testicular failure.



Prevention:

Avoid higher-risk activities if possible.



References:

Bhasin S. Testicular disorders. In: Kronenberg HM, Shlomo M, Polonsky KS, Larsen PR, eds. Williams Textbook of Endocrinology. 11th ed. Philadelphia, Pa: Saunders Elsevier; 2008:chap 18.

Bhasin S, Cunningham GR, Hayes FJ, et al. Testosterone therapy in adult men with androgen deficiency syndromes: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab. 2006 Jun;91(6):1995-2010.




Review Date: 6/22/2009
Reviewed By: Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine; Louis S. Liou, MD, PhD, Assistant Professor of Urology, Department of Surgery, Boston University School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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789 Central Avenue, Dover, NH 03820
Phone: (603) 742-5252
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